After Rubens Barrichello leave Jerez test, the Brazilian driver doubted the new car this 2011.
The Williams team seems to have worked with the distribution of weight and improving implementation to point to work more effectively with softer tyres Pirelli to display the result in time to a return.
Tests in Barcelona, the new FW33 Williams was able to convince Barrichello again and said: "We have a car fast."
In terms of last season, the Brazilian driver sees that they are better than last season, but still having problems on the horizon.
